A moot point means a question that is debatable or no longer important. This answer is correct because the expression has a fixed figurative meaning in English. In an SSC idiom question, students should match the whole phrase with its accepted meaning rather than translate each word separately.

• Classroom example: A moot point can refer to a question that is debatable or no longer important.
• Story example: A writer may use A moot point when describing a question that is debatable or no longer important.
• Exam example: When a sentence contains A moot point, choose the meaning “a question that is debatable or no longer important.”